Moonbyul was born Moon Byulyi 문별이 on Tuesday, December 22, 1992, in Bucheon, Gyeonggi-do.

She was born in the Chinese Year of the Monkey and her zodiac star sign is Capricorn. Her blood type is B, something she has in common with fellow members Solar and Wheein.

At a height of 165 cm or 5'5", she's the tallest member of Mamamoo. She's 3 cm taller than the shortest members, Wheein and Hwasa.

She's from Bucheon.

Moonbyul was cast as the lead in the web drama "Start Love" 스타트 러브 with SS501's Kim Kyujong.

She has two younger sisters, Seulgi and Yesol.

She attends Paekche Institute of the Arts where she studies media and music.

She choreographed Mamamoo's performances for "Mr. Ambiguous." She worked with Phantom's Hanhae on her rap lyrics for "Piano Man" and "Mr. Ambiguous." She plays the piano.

She's friends with former Kiss and Cry member Haena, Rainbow’s Jaekyung, and D-Unit’s Ram. Her nickname is “Black Hole” because she tends to sweat a lot. She wants to collaborate with Verbal Jint. She rooms with Wheein.